Questions tagged [equation]
The equation tag has no summary.
94 questions
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Block diagram help [closed]
I’m a little confused on what needs to be done and how to solve. If I could get any tips or help and maybe try work backwards that’d be great!
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How to derive Conversion Ratio M(D, K) for buck converters operating in DCM using loss- free resistor model
While studying DCM Averaged Switch Models from the Fundamentals of Power Electronics Book by Robert W. Erickson, I came across this Figure that represents the buck converter operating in DCM mode ...
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Theoretical equations Octave Switcher
How to derive the output voltage equation until pin 6 ? I wanna show how the octave switcher works in theory but I have problems in derivating all the equations. For exemple, assuming that the ...
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RC phase shift oscillator - frequency formula confusion
Context
While browsing through a popular video series on oscillators I encountered one that focuses on designing an RC phase shift oscillator. The link to the video is here.
In this type of oscillator,...
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Capability curve of synchronous generator
What is the equation that better describes the lower bound of capability curve which is core end heating limit as shown in this figure from Wikipedia 'Capability curve' :
Wiklipedia
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Is it mathematically possible to solve for base current in an ebers-moll calculation?
In this question, the OP is learning to use Ebers-Moll to describe transistor operation (just like me). The OP tried to apply a level 1 Ebers-Moll model by using a \$V_{be}\$ value from a simulator ...
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Push pull converter operation when both transistors are off
I am studying the operation of a push-pull converter from an excellent book. Currently, I am focusing on the state when both transistors are turned off, and previously, the \$T_{r1}\$ transistor was ...
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Calculation of the maximum \$R_{LED}\$ value for the TL431
I’m studying one of Christophe Basso's articles, and I don’t fully understand how the author expresses the maximum value of \$R_{LED}\$ in the equation.
I also tried deriving it myself, and the ...
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Theoretical equation to describe capacity fade
https://www.researchgate.net/publication/357842717_How_do_Depth_of_Discharge_C-rate_and_Calendar_Age_Affect_Capacity_Retention_Impedance_Growth_the_Electrodes_and_the_Electrolyte_in_Li-Ion_Cells
I am ...
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2
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RC circuit equation why have negative sign
I'm reading a book named The Art of Electronics.
What are some of the features of circuits with capacitors? To answer this question, let’s begin with the simple RC circuit (Figure 1.31). Application ...
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Noise added by an amplifier when deriving Friis's formula
I have been asked to derive the equivalent noise factor for a cascaded system of two amplifiers. Here is the figure of the system (assuming a general configuration where \$ G_1 \$ and \$ G_2 \$ are ...
2
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1
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Simple example of first order ODE and Operational Amplifier
Hayt's (8th edition) Engineering Curcuit Analysis (Chapter 9, p360) contains an illustration of Operational Amplifier solving \$\frac{d^2v}{dt^2} = -9v\$. It is hard for me to understand how it was ...
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Shockley equation of an E-MOSFET with a B instead of a K
I have a question about the following homework exercise.
I have no clue what B means in this equation. I could not find meaning of it in google nor in the books.
Could someone link me a resource or ...
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Why does this op-amp circuit show current flowing like that?
This image shows an op-amp being powered. Is there any reason why it shows current flowing from the negative side of the bottom battery into the op-amp or why it shows current flowing from the ...
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A circuit fulfilling equation
I am curious about establishing a circuit that satisfies the equation below:
−Vout =3⋅Vsource + 2000 ⋅ Isource
I tried to use an operational amplifier but could not ...
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